
class A {
    A() {
        System.out.println("I am class A");
    }

    A(String str) {
        System.out.println(str);
    }

    public int I() {
        return 0;
    }
}

class B extends A {
    B() {
        super("Hello!");
    }

    public int I() {
        return 1;
    }
}

public class exampleP72 {
    public static void main(String[] args) {
        B b = new B();
        System.err.println(b.I());
    }
}
